Question

(a,b)*[a,b]=72 aflati a si b a =b a < b

Answer 1

se stie ca
(a,b)*[a,b]=ab=72
 a=1, b=72 verifica pt ca (a,b) =1; [a,b]=72
a=2, b=36  verifica , 2*36=72
a=3, b=24 vertifica, 3*24=72
a=4, b=18 verifica 2*36=72
a=6, b=12 verifica 6*12=72
 a=8, b=9 verifica 1*72=72
urmatoarele nu le incercam ptca a>b
 deci (a, b) ∈{(1;72);(2;36);(3;24);(4;18);(6;12);(8;9)}